Potassium Trioxalatoferrate

Delving into the Green World of Potassium Trioxalatoferrate(III)

The vibrant green crystals of potassium trioxalatoferrate(III), a fascinating coordination compound, hold a key to understanding the intricate world of coordination chemistry and its diverse applications. While seemingly a niche topic, this compound offers a rich learning experience encompassing crystallography, redox reactions, photochemistry, and even historical context. Its unique properties have led to its use in various fields, from photography to environmental remediation, making it a worthy subject for detailed exploration. This article aims to provide a comprehensive overview of potassium trioxalatoferrate(III), delving into its synthesis, properties, applications, and safety considerations.

1. Chemical Structure and Synthesis: Unraveling the Green Mystery

Potassium trioxalatoferrate(III) trihydrate, with the chemical formula K₃[Fe(C₂O₄)₃]·3H₂O, is a coordination compound where the central iron(III) ion (Fe³⁺) is surrounded by three bidentate oxalate ligands (C₂O₄²⁻). Each oxalate ligand coordinates to the iron ion through two oxygen atoms, forming a stable octahedral complex. The potassium ions (K⁺) balance the negative charge of the complex anion, and three water molecules are incorporated into the crystal structure as water of crystallization. This intricate arrangement dictates its distinctive properties.

The synthesis of potassium trioxalatoferrate(III) is relatively straightforward, although careful control of reaction conditions is crucial for obtaining high-purity crystals. A common method involves reacting iron(III) chloride with potassium oxalate in a slightly acidic aqueous solution:

2FeCl₃ + 6K₂C₂O₄ + 3H₂O → 2K₃[Fe(C₂O₄)₃]·3H₂O + 6KCl

The reaction proceeds via the stepwise replacement of chloride ions by oxalate ligands. Slow evaporation of the resulting solution allows for the crystallization of the complex. The purity and crystal size are influenced by factors like temperature, pH, and the concentration of reactants. Impurities can significantly affect the complex's photochemical properties, highlighting the need for meticulous synthesis techniques.

2. Properties: A Multifaceted Compound

Potassium trioxalatoferrate(III) exhibits several key properties:

Color and Appearance: Its characteristic emerald green color arises from the d-d electronic transitions within the iron(III) ion in its octahedral environment. The crystals are typically well-formed, ranging in size depending on the crystallization conditions.
Solubility: It's moderately soluble in water, forming a green solution. Its solubility is affected by temperature and the presence of other ions.
Photochemical Sensitivity: This is perhaps its most notable property. Upon exposure to light, particularly ultraviolet (UV) light, it undergoes a photochemical reaction, reducing the iron(III) to iron(II) and oxidizing the oxalate ligand. This process is exploited in actinometry, the measurement of light intensity.
Redox Properties: The iron(III) ion can be easily reduced to iron(II), and the oxalate ligand can be oxidized, showcasing its potential in redox reactions. This makes it a useful reagent in certain chemical processes.
Thermal Stability: The complex is relatively stable at room temperature but decomposes upon heating, releasing carbon dioxide and other gaseous products.

3. Applications: From Photography to Environmental Science

The unique properties of potassium trioxalatoferrate(III) have led to its application in diverse fields:

Actinometry: Its sensitivity to light makes it an ideal chemical actinometer, used to determine the intensity of light sources, particularly in photochemical studies. This application relies on the precise quantification of the iron(II) ions produced upon photolysis.
Photography: Historically, it played a role in early photographic processes, though it has been largely replaced by more modern techniques.
Environmental Remediation: Research explores its potential in photocatalytic degradation of pollutants. Its ability to generate reactive oxygen species upon irradiation makes it a promising candidate for removing organic contaminants from water.
Catalysis: Its redox properties could be exploited in catalytic reactions, though this area remains under active investigation.

4. Safety Considerations: Handling with Care

While potassium trioxalatoferrate(III) is not exceptionally toxic, standard laboratory safety practices should always be followed. Skin contact should be avoided, and appropriate eye protection is essential. The compound should be stored in a dark, cool place to prevent decomposition due to light exposure. Proper disposal methods should be followed, considering its potential environmental impact.

5. Conclusion

Potassium trioxalatoferrate(III) is more than just a pretty green crystal; it is a fascinating example of a coordination compound with significant practical applications. Its synthesis, properties, and applications showcase the beauty and utility of coordination chemistry. Understanding its behavior provides valuable insight into photochemistry, redox reactions, and the design of novel materials for diverse applications. Further research into its potential applications, particularly in environmental remediation and catalysis, remains an active and promising area of study.

Frequently Asked Questions (FAQs):

1. Is potassium trioxalatoferrate(III) toxic? While not highly toxic, direct skin contact should be avoided, and appropriate safety measures should be taken during handling and disposal.

2. How can I store potassium trioxalatoferrate(III) to prevent decomposition? Store it in a dark, cool, and dry place, away from direct sunlight.

3. What are the by-products of its photochemical decomposition? The primary products are iron(II) ions, carbon dioxide, and potentially other oxidation products from the oxalate ligand.

4. Can potassium trioxalatoferrate(III) be used as a catalyst? Its redox properties suggest potential catalytic applications, but research in this area is still ongoing.

5. What are the challenges in using potassium trioxalatoferrate(III) for environmental remediation? Challenges include optimizing its photocatalytic activity, cost-effectiveness, and efficient separation from the treated water after the remediation process.

Search Results:

Potassium trioxalatoferrate(III) trihydrate, Thermo Scientific ... Potassium trioxalatoferrate(III) trihydrate is used in chemical actinometry to measure light flux. This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product …

The dc and ac properties of potassium trioxalatoferrate (III ... 1 Mar 2008 · The complex potassium trioxalatoferrate (III) trihydrate {K 3 (Fe (C 2 O 4) 3 · 3H 2 O)} was synthesised and characterised by energy dispersion X-ray fluorescence (XRF) and X …

Potassium trioxalatoferrate synthesis - SSERC Potassium trioxalatoferrate (III) can be prepared from ammonium iron (II) sulphate. A solution of the latter is first treated with oxalic acid to form a precipitate of iron (II) oxalate and ammonium …

Potassium Ferric Oxalate - HoloWiki In this Laboratory exercise we will synthesize the Coordination Compound Potassium Ferric Oxalate Trihydrate, K3[Fe(C 2O4)3]•3H 2O. This compound is the Potassium salt (K +) of the …

Potassium ferrioxalate - Wikipedia Potassium ferrioxalate, also called potassium trisoxalatoferrate or potassium tris (oxalato)ferrate (III)[3] is a chemical compound with the formula K 3[Fe (C 2 O 4)3]. It often occurs as the …

PREPARATION OF AN IRON COORDINATION COMPOUND A. In this experiment you will synthesize the iron coordination compound, potassium trioxalatoferrate (III), K3[Fe(C2O4)3]. In the subsequent experiment, you will analyze this salt for iron (III) and …

PPA1 Preparation of Potassium Trioxalatoferrate - A-Level … 3 Jul 2010 · Aim: The aim of the investigation was to prepare Potassium Trioxalatoferrate (III) from Ammonium Sulphate and then calculate the percentage yield. Introduction. a) Ligand. The …

Preparation of Potassium Trioxalatoferrate Trihydrate 24 May 2018 · The first step in the synthesis of Potassium Trioxalatoferrate(III) trihydrate, K3[Fe(C2O4)3].3H2O, is the preparation of Iron(II) oxalate. Ferrous ammonium sulfate reacts …

Potassium trioxalatoferrate(iii) trihydrate | 5936-11-8 - MilliporeSigma Potassium trioxalatoferrate(iii) trihydrate; CAS Number: 5936-11-8; Linear Formula: C6FeO12.3K.3H2O; find Combi-Blocks, Inc.-COMH95E96D1B MSDS, related peer-reviewed …

Potassium ferrioxalate | C6FeO12.3K | CID 9932777 - PubChem Potassium ferrioxalate | C6FeO12.3K or C6FeK3O12 | CID 9932777 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, …

Potassium ferrioxalate - Wikiwand Potassium ferrioxalate, also called potassium trisoxalatoferrate or potassium tris(oxalato)ferrate(III) [3] is a chemical compound with the formula K 3 [Fe(C 2 O 4) 3]. It often …

SAFETY DATA SHEET - fishersci.co.uk Product Description: Potassium trioxalatoferrate(III) trihydrate Cat No. : 31124 CAS No 593611-8 Molecular Formula K3 Fe(C2 O4)3.3H2 O 1.2. Relevant identified uses of the substance or …

POTASSIUM TRIOXALATOFERRATE(III) | 5936-11-8 23 Apr 2023 · POTASSIUM TRIOXALATOFERRATE(III) (CAS 5936-11-8) information, including chemical properties, structure, melting point, boiling point, density, formula, molecular weight, …

Potassium Trioxalatoferrate (III): A Comprehensive Overview 5 Mar 2025 · Potassium Trioxalatoferrate(III) is a versatile chemical compound used in various applications, including chemical actinometry and organic synthesis. This article provides an in …

The Synthesis, Chemistry and Magnetic Properties of Potassium ... Iron, perhaps the most familiar element in the first transition series, forms a large number of complexes. The purpose of this laboratory exercise is to synthesize a complex of iron(III), …

Preparation and analysis of potassium tris(oxalato)ferrate(III ... The analysis of this compound combines gravimetric and titrimeric methods and includes a unique and colorful photoredox reaction.

Potassium ferrioxalate - chemeurope.com Potassium ferrioxalate, is a chemical compound with the formula K 3 [Fe(C 2 O 4) 3], where iron is in the +3 oxidation state. It is an octahedral transition metal complex in which three …

Potassium trioxalatoferrate(III) trihydrate, Thermo Scientific … Potassium trioxalatoferrate(III) trihydrate is used in chemical actinometry to measure light flux. This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product …

Preparation of Potassium Trioxalatoferrate (III) - GCSE Science ... The preparation of potassium trioxalatoferrate (III) takes place in three stages. Firstly, ammonium iron (II) sulphate reacts with oxalic acid to give iron (II) oxalate and ammonium …

Trioxalatoferrate synthesis - SSERC Potassium trioxalatoferrate (III) can be prepared from ammonium iron (II) sulphate. A solution of the latter is first treated with oxalic acid to form a precipitate of iron (II) oxalate and ammonium …

Potassium Trioxalatoferrate

Delving into the Green World of Potassium Trioxalatoferrate(III)

1. Chemical Structure and Synthesis: Unraveling the Green Mystery

2. Properties: A Multifaceted Compound

3. Applications: From Photography to Environmental Science

4. Safety Considerations: Handling with Care

5. Conclusion

Frequently Asked Questions (FAQs):

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